I'm kind of burned out on D&D and am working on putting together a 1930s Pulp-style game using the Savage Worlds system. (I looked at Pulp Cthulhu first, but decided I really don't like %-based systems. I also looked at Hollow Earth Expedition, which I really liked, but also seems to be out of print and it doesn't have Foundry VTT support that I can find.)
I haven't decided if I'm going serial or episodic with the story, yet, though the idea of "Break a supervillain out of Alcatraz" just popped in my head as an adventure idea and I'm going to have to find a way to incorporate it, now. (Even better if I can have the heroes put him away in the first place earlier in the campaign.)